"Opera 11.50 introduces a new and novel type of browser extension: Speed Dial extensions. Instead of handy thumbnails and links to your top sites, you can embed your Speed Dial with extensions that keep you updated - instantly - on what is happening around the Web." Other cool stuff includes more updates to the interface, password synchronisation between your Opera installations, and lots under-the-hood stuff.

Basically, they run a function that adds rate to the current value of the counter ten times a second. The initial value of the counter and rate (currently 9; it was 10 some minutes ago) are sent by the server and don't change unless you reload.